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• Andreescu tore ankle ligaments in Miami as US Open winner gives update on WTA Tour lay-off

  Bianca Andreescu has revealed she tore ankle ligaments and faces time on the sidelines after her excruciating injury blow at the Miami Open.

  Former US Open champion Andreescu, who in 2019 beat Serena Williams in what proved to be the American great's last grand slam final, is set to miss at least the start of the clay-court season.

  The Canadian 22-year-old was enjoying an excellent run in the Miami event, knocking out Emma Raducanu, Maria Sakkari and Sofia Kenin en route to the last-16 stage.

  She dropped the first set against Ekaterina Alexandrova on Monday but was an early break to the good in the second when injury struck, forcing her to abandon that fourth-round match.

  Andreescu howled in pain on the court after suffering the ankle blow and needed to be taken away in a wheelchair.

  She joked the day after: "Woke up with a brace on my foot… anyone know what happened?"

  Now she knows exactly what happened, and the news is not particularly good.

  Andreescu posted on Twitter: "Results show that I've torn 2 ligaments in my left ankle. It's tough to say exactly how long it will take, but let's just say it could've been much worse!!

  "I'm going to take it day by day, and I am optimistic that with the right work, rehab, and preparation, I'll be back on court soon. Rehab process has already started and will continue to give updates."

  Andreescu has suffered a string of injuries since becoming a teenage grand slam winner. She sits 31st in the WTA rankings, having been as high as number four in October 2019.

  Miami marks the end of a hardcourt swing on the tour, with clay set to take over for two months, starting in Charleston at a WTA 500 event next week.

• Cirstea stuns second seed Sabalenka in straight sets in Miami Open quarters

  World number 74 Sorana Cirstea produced a major shock in the Miami Open quarter-finals after toppling 2023 Australian Open champion Aryna Sabalenka in straight sets on Wednesday.

  The 32-year-old Romanian triumphed 6-4 6-4 over the in-form Belarusian to progress to her first WTA-1000 semi-final for a decade, dating back to the 2013 Canadian Open in Toronto.

  World number two Sabalenka came into the contest as the highest remaining seed after Iga Swiatek's withdrawal, having won a tour-leading 20 matches this season.

  But Cirstea blew Sabalenka away in one hour and 27 minutes, maintaining her fine run in Miami where she has not dropped a set in five matches.

  Sabalenka hit more winners than Cirstea (21-16) but the Romanian was more polished, committing only nine unforced errors compared to the Australian Open winner's 21.

  Cirstea broke Sabalenka in the first game of each set and showed resolve when she served out victory from 15-40 down.

  "I think I'm a bit speechless," Cirstea said after the match. "I came out knowing that it's going to be a really tough match. Aryna hits so hard, so I knew I had to hold my ground, and I'm very, very happy with my performance today."

  Cirstea's list of scalps includes fifth seed Caroline Garcia, former top 20 player Karolina Muchova and now Sabalenka.

  The Romanian also reached the quarter-finals at the Indian Wells Open a fortnight ago, losing to Swiatek in the last eight.

  Cirstea will need to wait to learn her semi-final opponent with the quarter-final between 15th seed Petra Kvitova and 18th Ekaterina Alexandrova re-scheduled to Thursday after the evening session was cancelled due to persistent rain.

• Rybakina wins 12th straight to reach Miami Open semi-finals, Pegula beats Potapova

  Elena Rybakina is now two wins away from completing the rare 'Sunshine Double' after defeating Martina Trevisan 6-3 6-0 to reach the Miami Open semi-finals on Tuesday.

  Only four women have ever claimed the Sunshine Double – which requires winning both the Indian Wells Open and Miami Open. Steffi Graf did it in both 1994 and 1996, Kim Clijsters did it in 2005, Victoria Azarenka accomplished the feat in 2016 and current world number one Iga Swiatek did it just 12 months ago.

  Rybakina knocked off Swiatek and world number two Aryna Sabalenka in consecutive matches en route to the Indian Wells title, and she has now extended her winning streak to 12 with Tuesday's victory. Against Trevisan, Rybakina served another 10 aces compared to zero from the Italian.

  In her fourth-round match the Kazakhstan representative became the first WTA player this season to post three consecutive matches with at least 10 aces, and with another she became the first woman since Serena Williams at the 2020 US Open to do so in four consecutive matches at the same tournament.

  She needed just 27 minutes to race through the second set, and in the process she booked a semi-final against third seed Jessica Pegula.

  America's top hope, Pegula had to come from behind against Russia's Anastasia Potapova in the 4-6 6-3 7-6 (7-2) result, saving two match points in the deciding set to force the pivotal tiebreaker.

  The match was delayed for hours due to persistent rain, and the contest lasted two hours and 38 minutes, meaning they did not finish up on court until nearly 1:30am local time.

  While consistently making it deep into major tournaments, Pegula only has two WTA singles titles to her name, and only once since the end of 2019. 

  With one more win she can book her spot in the final, and a chance to claim her second WTA 1000 crown after breaking through at the 2022 Guadalajara Open.